Police say early lockouts and drink restrictions are helping to reduce the number of alcohol-related assaults in Byron Bay.

Most major venues in the popular tourist town adopted a voluntary raft of measures in March last year.

Police day in the 12 months since then, the assault rate has dropped by 13 per cent.

Superintendent Stuart Wilkins says that is despite big crowds flocking to the area over summer.

"Certainly the police tell me, and from my own observations it's been a really busy time both at the Tweed and at Byron over the summer period," he said.

"In particular the good weather has brought people in and around the area, so we're pretty happy.

"In particular the last couple of months, in February we've seen nine alcohol-related assaults and in March eight alcohol-related assaults, which is a significant reduction on the years gone by.

"We can clearly show that by having the 1:30 lockout, which is a voluntary condition for the licensed premises at Byron and part of their liquor accord, we've seen a reduction in assaults during that period.

"That's one of the compelling arguments that we say is working for those voluntary conditions, that there have been less assaults after midnight.

"That's a really good thing for us."

Supt Wilkins says liquor accord members have agreed to keep the rules in place for another year.

"That's a fantastic implementation by the liquor accord, and all of those measures that were in place have been agreed to, and there's another measure that outlaw motorcycle gang members will not be allowed in their licensed premises wearing colours," he said.